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Cornerstone Oct 4 - 10 25 questions
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Monday 4 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 3⁄5 + 5⁄6

    Answer: 43⁄30
  2. 2. Algebra

    Solve: 2x + 3 = 9

    Answer: x = 3
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio

    Divide 209 in the ratio 4:3:4

    Answer: 76, 57 and 76
  5. 5. Statistics

    Find the mean of: 18, 15, 2, 11

    Answer: 11.5

Tuesday 5 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra

    Solve: 4x - 12 = 40

    Answer: x = 13
  3. 3. Geometry

    Calculate the hypotenuse when a = 11cm and b = 5cm

    Answer: 12.08cm
  4. 4. Ratio

    Divide 150 in the ratio 4:3:3

    Answer: 60, 45 and 45
  5. 5. Statistics

    Calculate the mean of: 16, 25, 17, 46, 15, 17, 39

    Answer: 25

Wednesday 6 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 5⁄7 + 2⁄3

    Answer: 29⁄21
  2. 2. Algebra

    Solve: 8x - 9 = 23

    Answer: x = 4
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Divide 84 in the ratio 1:2:4

    Answer: 12, 24 and 48
  5. 5. Statistics

    Calculate the mean of: 36, 40, 19, 44, 43, 43, 32

    Answer: 36.7

Thursday 7 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra

    Solve: 2x + 12 = 22

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 5cm and b = 6cm

    Answer: 7.81cm
  4. 4. Ratio

    Divide 77 in the ratio 1:3:3

    Answer: 11, 33 and 33
  5. 5. Statistics

    Find the mean of: 8, 6, 3

    Answer: 5.6666666666667

Friday 8 October 2021

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 6x + 9 = 69

    Answer: x = 10
  3. 3. Geometry

    Calculate the hypotenuse when a = 6cm and b = 6cm

    Answer: 8.49cm
  4. 4. Ratio

    Divide 60 in the ratio 1:2:3

    Answer: 10, 20 and 30
  5. 5. Statistics

    Find the mean of: 14, 7, 6, 3

    Answer: 7.5